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In Reply to: RE: anyone hear... posted by bcguitar on June 19, 2015 at 18:12:55
I really like the 2435 on a Le Cleac'h horn. I use it from 800Hz to ~10kHz on a 385Hz horn, T=1.4.
Follow Ups:
Hi John.
Good to see you have the 2435 up and running.
I'm curious how to hear how you have chosen to filter it,
and what you have implemented above and below.
Any time aligned upper bass solutions? Pictures?
My implementation was first order on both ends.
Never had a proper LeCleach, and found myself quite
sensitive to the upper end breakup. Eventually I chose
the path of alnico and phenolics, as I'm sure John will
never forget. (John build me an amazing 4" throat horn
adaptor to allow me to play a JBL2482 backwards through an
Oris 150.)
Hi Mats,
I'm using a JBL 2225 in a sealed box for the mid bass at the moment and a JBL Sub 1500 sealed for the bass. Then the 2435 for the mids and a JBL2402 that I made a custom LeCleac'h horn and phase plug for. See pic below.
I used DSP to do the crossover, so I don't know off hand what filters I used to get the response I did, but the acoustic slopes that I corrected the response to was:
80Hz 4th order Linkwitz-Riley between sub and
800Hz 8th order LR
9000Hz 2nd order LR to tweeter, then 2k 2nd order BW HP on tweeter
This gives an okay response, but there are dips in the listening window and power response around the two crossovers due to the vertical spacing.
I just have a slight amount of time delay to get everything to line up. But what I'm looking at changing to is a crossover that gives me smoother listening window and power response. The overlap is a bit wider between the 2435 and the 2402 and the vertical polar gets a bit weird due to this, but I'm thinking it mist still sound better. The acoustic slopes for this are:
Tweeter:
9k 1st BW HP
2.5k 2nd BW HP
Mid:
6k 2nd BW LP
15k 1st BW LP
770 6th LR HP
Low mid:
550Hz 6th LR LP
80Hz 4th LR HP
This relies to some degree on then eq'ing the overall response to get flat response through the crossovers. The results should be basically smooth listening window and power response due to mostly eliminating the sharp vertical dips in the polar response. I still need to try it, but at the moment I'm working on building the second side of the system. Then I'll convert to a miniDSP system with FIR filtering and better HF amps. I'd add screen shots of the measurements, but it seems I can only add the one image. Weird...
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